<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="uname" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="item.id">
          <td>{{ index + 1 }}</td>
          <td>{{ item.uname }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="duc(item.id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
// 一定一定要记得 数据驱动视图
export default {
  data() {
    return {
      id: "",
      uname: "",
      age: "",
      gender: "",
      isEdit: true,
      arr: [
        {
          id: 1,
          uname: "1",
          age: 18,
          gender: "男",
        },
        {
          id: 2,
          uname: "5",
          age: 14,
          gender: "女",
        },
      ],
    };
  },
  methods: {
    add() {
      if (this.uname && this.age && this.gender) {
        
        if (this.isEdit) {
          const newObj = {
            id: +new Date(),
            uname: this.uname,
            age: this.age,
            gender: this.gender,
          };

          this.arr.push(newObj);
          this.uname = "";
          this.age = "";
          this.gender = "";
          this.isEdit = true;

        } else {
          this.isEdit = true;
          this.arr.map((item) => {
            if (item.id === this.id) {
              (item.uname = this.uname), (item.gender = this.gender);
              item.age = this.age;
            }
          });
        }
        this.uname = "";
        this.age = "";
        this.gender = "";
        this.id = "";
      }
    },
    // 要修改的显示到表单中
    duc(id) {
      // console.log(id);
      this.isEdit = false;
      const obj = this.arr.find((item) => item.id === id);
      // console.log(obj);
      (this.uname = obj.uname), (this.age = obj.age);
      this.gender = obj.gender;
      this.id = obj.id;
    },
    // 删除
    del(id) {
      // console.log(id);
      this.arr = this.arr.filter((item) => item.id !== id);
    },
  },
};
</script>
